Ideofy LA-08

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Ideofy LA-08
Ideofy la 08.png
Status planned
Channels 8
Samplerate 96MHz@2ch (or 60MHz@4ch, or 30MHz@8ch)
Samplerate (state) ?
Triggers low, high, rising, falling, either
Min/max voltage -0.7V — +16V
Threshold voltage Fixed: VIH=2.0V, VIL=0.8V
Memory 100K~50Mpoints/channel
Compression ?
Website ideofy.com

The Ideofy LA-08 is a USB-based, 8-channel logic analyzer with a max. samplerate of 96MHz@2ch (or 60MHz@4ch, or 30MHz@8ch).

See Ideofy LA-08/Info for more details (such as lsusb -vvv output) about the device.

Hardware

Photos

Protocol

Firmware upload

The usual mechanism for uploading firmware to Cypress FX2 chips is used.

Query info / serial number (?)

A control transfer (direction: device->host, type: vendor-specific, request: 0xc2, value: 0x0000, index: 0x0000, length: 0x0020).

The 0x20 (32) bytes received contain the device's serial number as printed on the box (7 ASCII characters, can contain letters and digits), and some other, unknown info.

Example:

0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

Note: Only the serial number location is marked, not all bytes are 0x00!

Starting an acquisition

To start an acquisition with a certain samplerate, a control transfer (direction: host->device, type: vendor-specific, request: 0xb6, with certain "value" and "index" entries, length: 0x0000) is sent to the device.

Samplerates

Samplerate Value Index
100kHz 0x0006 0x9695
200kHz 0x0000 0x9595
500kHz 0x0000 0x3b3b
1MHz 0x0000 0x1d1d
2MHz 0x0000 0x0e0e
5MHz 0x0000 0x0505
10MHz 0x0000 0x0202
15MHz 0x0000 0x0101
24MHz 0x0008 0x0101
30MHz 0x0003 0x0101

Getting samples

The vendor software retrieves the samples in 0x4000 (16kB) chunks via bulk transfers (endpoint address: 0x86, i.e. endpoint 6).

Sample format

The probes (on the device housing) are numbered 1-8. They seem to have internal pull-ups, i.e. if you don't connect them to the target, their value will be high (1).

  • 8 probes: Bit 7 is the value of probe 8, bit 0 is the value of probe 1.
  • 4 probes: Bit 3 is the value of probe 4, bit 0 is the value of probe 1. Bits[7:4] are probes 4..1 respectively.
  • 2 probes: Bit 1 is the value of probe 2, bit 0 is the value of probe 1. Bits[7:6], bits[5:4], and bits[3:2] are probes 2..1 respectively.

Triggers

Implemented purely in software, it seems.

Stopping acquisition / reset (?)

After an acquisition the vendor software sends a control transfer (direction: host->device, type: vendor-specific, request: 0xb7, value: 0x0000, index: 0x0000, length: 0x0000) to the device.

Status (?)

A control transfer (direction: device->host, type: vendor-specific, request: 0xb5, value: 0x0000, index: 0x0000, length: 0x0040) is also sent after an acquisition.

This retrieves 0x40 (64) bytes from the device, which probably represent status values or the like.

Example:

0x00 0x01 0x00 0x00 0xff 0xPP 0xQQ 0xRR 0x55 0x55 0x02 0x00 0x86 0xa9 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

The "0xPP 0xQQ 0xRR" bytes seem to differ upon most sample runs (as do some of the other bytes). The last 48 bytes seem to be 0x00 always.

Byte 1 seems to have 0x00 and 0x01 as possible values.

Bytes 0x55 0x55 and byte 0x86 seem to not change usually.

The 0x02 byte is 0x03 sometimes.

The 0xa9 byte is 0x99 sometimes.

Resources

TODO.